Abstract
The photosynthetic purple sulfur bacterium Chromatium vinosum possesses an active transport system for glucose that also transports the nonmetabolizable glucose analog, αmethylglucoside. Transport is not accompanied by phosphorylation nor does it appear to require ATP. Rather α-methylglucoside uptake appears to be driven directly by the electrochemical proton gradient produced by light-driven cyclic electron flow.
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